Mensuration Practice Test 8

Question : 14 of 40

Marks: +1, -0

Find the length of the longest rod required to join the diagonals of a cuboid measuring 21 × 16 × 5 cm.

Solution:

Length of the diagonal =

√{l^2+b^2+h^2}

√{21^2+16^2+5^2}

√{441+256+25}

√{722}

19√2

cm
= 19 × 1.41 cm
≈ 20 cm

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